Why is this important to you?
From the point of view of the law, anyone who makes an elevator available for traffic creates a risk.
Due to the operator’s obligations, not only company employers, but also the owners of residential buildings, such as real estate companies or private landlords, are responsible in the event of liability damage. Especially when there is a lack of in-house expertise, operators are more dependent than ever on reliable (!) and high-quality service companies.
Please bear in mind that even if the duty of traffic safety is delegated for elevator systems, the delegator may be liable if, for example, he does not adequately check the company he has commissioned, if the commissioned company does not properly maintain the elevator and the operator is aware of this, or should have known.